Open AccessResearch on Coordinated DC voltage Control Strategy of DC Microgrid based on Photovoltaic Power Generation System
Author(s) -
Ke Zhou,
Xiaoying Qiu,
Yi Song,
Qingren Jin,
Zhiyue Mo
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2246/1/012066
Subject(s) - microgrid , photovoltaic system , backup , renewable energy , power (physics) , converters , energy storage , voltage , computer science , state of charge , electric power system , control theory (sociology) , engineering , electrical engineering , control (management) , battery (electricity) , quantum mechanics , database , artificial intelligence , physics
DC microgrid system is a flexible and commonly used renewable power generation system. Among them, the energy storage system (ESS) can reduce the waste light of the photovoltaic (PV) power generation system and provide stable power output for the power grid. However, a reasonable control strategy is needed to realize the energy balance of PV, grid-connected converter and ESS, so as to ensure the safe and stable operation of DC microgrid. Therefore, this paper proposes a DC voltage coordination control strategy without communication. The control strategy can automatically coordinate the working state of each converter of DC microgrid, which according to the change of DC voltage and the ESS’s state of charge (SOC), At the same time, the inertia of DC voltage in each working state is analyzed, and the stability of DC microgrid is improved through the backup inertia support of ESS. Finally, the effectiveness of the proposed method is verified by simulation and experiments.